Linear Equation...

Which of the following equations has (3, -4) as its solution?

In a basketball match, Team A and Team B scored the number of the three pointers equal to Team C, which scored 20 three pointers. It was found that the score was miscalculated and was therefore calculated again. It was found that Team C scored 30 three pointers and Team B scored 13 three pointers. It was found that coincidentally the number of three pointers scored by Team A was same as the previous result.

What was the number of three pointers scored by Team D, if the numbers of three pointers of Team B (actual), Team A (actual) and Team B (miscalculated) when add up make the same score as Team D?

Ram is paid Rs. 50 for delivering letters at the end of the week. On delivering each letter, he is paid Rs. 2. Shyam is paid Rs. 20 for delivering birthday cards at the end of each week. On delivering each card, he is paid Rs. 5. The money that Ram gets after a week is exactly the same as the money Shyam gets after two weeks.
(Assume that the number of letters delivered by Ram is x and the number of birthday cards delivered by Shyam is y.)

Which of the given options satisfies the above situation?